Improvement in pump-valves



KROCKER.

. PUMP-VALVE.

Patented Nov. 7,1876.

UNITED STATES PATENT QFFIOE.

BERTHOLD KROOKER, OF BRESLAU, PRUSSIA.

IMPRQVEMENT IN PUMP-VALVES.

Specification forming part of Letters Patent No. 184,014, dated November 7, 1876; application filed March 25, 1876.

.much the harder as the height of the lifted Water-column increases.

To the body or the valve-chest A are fitted the seats of the suction-valve B and of the discharge-valve 0, both consisting of a leather or rubber disk secured between two metallic plates by rivets or screws. The valve 0 is weighted directly with a weight, E, at the top of the valve-stem passingthrough the chest-cover F, to secure a tight closing of the valve. The suction-valve B contains a cyliir drical opening or tube, G, and inside of this tube an annular projection, which serves as a seat for the difl'erential valve H sliding, ,with its leather packing, in the upper part of the tube G. This valve is attached to a rod, D, passing through the second chest-cover K, and bearing below-H a disk, J, which closes the lower end of the tube Gr when the valve H is in its highest position. Vent-holes are drilled in the lower part of the tube G to secure a ready outlet of the water confined in it. The rod D serves, consequently, as valvestem for the valve 13 as soon as the sucking action of the pump begins. The area of the valve H is made so large that the pressure on it counterbalances the weight E to a certain degree and relieves the valve 0 of a corresponding part of its pressure. The rod D is connected, by the link L, to the longer arm G of the lever M, the fulcrum of which is at N.

"The other arm S of the lever M bears a weight,

0, to counterbalance the link L, rod D, and valve H, and is provided with a sleeve-opening,'through which the stem of the valve 0 passes, which sleeve supports the above-mentioned weight E. The proportion of the arms Q and'S of the lever M is 2 1.

The working of this arrangement is as follows: At the moment when the sucking action of the pump ceases the valve B goes down to its seat, carrying with it the difierential valve H in its relative highest position; and the sleeve P of the lever M just bears against the weight E. As soon as the pressure begins the difierential valve H is forced down to its seat, acting on the valve 0 with double the power of the weight E. Consequently, the valve 0 is relieved of a pressure equal to double the pressure resting on the differential valve El, and is now easily lifted higher without any shock by the pressureof the rising water. The valve 0 closes at the end of the stroke of the pump, also the valve B, carrying with it the dit'ferential'valve H in its relative highest position. Then the suction begins, and so on.

What I claim is-- 1. The suction-valve of a pump composed of the annular valve B and the differential valve H, with its disk J, and connected, by'

means of two valve-stems, link L, and lever M, to the discharge-valve O, substantially as shown, and for the purpose set forth.

2. The differential valve H forming part of, and sliding inside, the annular suction-valve B, for the purpose set forth, in combination with the directly-weighted discharge-valve O and intermediate mechanism, substantially as shown.

This specification signed by me in presence of two witnesses this 31st day of December, 1875.

BERTHOLD KROOKER.

Witnesses HERMAN KREISMANN, GERARD HAWRODE. 

